Resource-efficient digital chromatic dispersion compensation in fiber optical communication using spectral shaping subcarrier modulation
US9112608B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 8, 2013 |
| Grant date | Aug 18, 2015 |
| Priority date | — |
| Expiry date | Oct 20, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04J14/02
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An optical receiver comprising a frontend configured to receive an optical signal and convert the optical signal into a plurality of digital electrical signals comprising a plurality of spectrally shaped subcarrier signals carrying symbol mapped data information, and a digital signal processor (DSP) unit coupled to the frontend and configured to receive the digital signals from the frontend, demulitplex the digital signals into the subcarrier signals, and compensate chromatic dispersion (CD) for each of the subcarrier signals by applying an equalizer, wherein each of the subcarrier signals is associated with a unique tone frequency and a unique spectral shape. Also disclosed is an optical transmitter comprising a digital signal processor (DSP) unit configured to map data symbols onto a plurality of electrical subcarrier signals that are non-overlapping and spectrally shaped in a frequency domain.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.